Rolling bearing state monitoring method
A rolling bearing and state technology, which is applied in the field of state monitoring and fault diagnosis of rotating machinery, can solve the problems of difficulty in timely and accurately detecting early faults of rolling bearings, poor noise resistance and robustness, and large errors, and simplify the dynamic analysis process , good noise immunity and robustness, the effect of eliminating noise
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[0034] Examples such as figure 1 As shown, a method for monitoring the condition of rolling bearings is implemented in the following steps:
[0035] 1) Use the acceleration sensor to measure the vibration signal of the rolling bearing at fixed time intervals, and record the signal obtained at the i-th time as x ik (k=1,2,...,N), N is the length of the sampled signal; the time interval is generally 10 minutes;
[0036] 2) According to the rising or falling relationship between adjacent sequence points, the sequence x ik Convert to binary symbol sequence ,
[0037] ,
[0038] 3) Define m consecutive characters as a word, convert the binary symbol sequence into a set containing different word types by sliding the data points, calculate the frequency of each word type, and finally get a length of 2 m The word frequency sequence of; generally set m=8;
[0039] 4) The initial state is taken as the normal reference state, the correlation coefficient between the word frequency sequence corre...
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